Finding the Fourth Proportional to 85,677.12, 128,283.84 and 60,613.92
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Solution
The fourth proportional to 85,677.12, 128,283.84 and 60,613.92 is: 90,756.86
Step by Step Solution
- Step 1: Write the proportion equation
85,677.12 : 128,283.84 = 60,613.92 : x - Step 2: Convert to fraction form
85,677.12/128,283.84 = 60,613.92/x - Step 3: Cross multiply
85,677.12x = 128,283.84 × 60,613.92 - Step 4: Simplify right side
85,677.12x = 7,775,786,415.05 - Step 5: Solve for x
x = 7,775,786,415.05/85,677.12 - Step 6: Final answer
x = 90,756.86
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.